Ravens running back Alex Collins dealt with migraines after Sunday's 44-20 win, and coach John Harbaugh deferred any questions about that issue to the team's leading rusher. "I can tell you this, migraines are very real," Harbaugh said. "They're tough." (ESPN - Jamison Hensley)

FFToday's Take:Sterling Shepard missed a pair of games with migraines before returning in Week 13. Going back a few years, Hall-of-Famer Terrell Davis famously dealt with them as well. In other words, migraines aren't a career-ending condition, but they are obviously a concern for any player that has to deal with them. If Collins must sit this week or beyond, Danny Woodhead and Javorius Allen would likely assume most of the workload.

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